docs: def exit_handler(signum, frame):
      """
      Catch SIGTERM and SIGHUP and call "sys.exit" which raises
      "SystemExit" exception.
      This will trigger all the cleanup code defined in ContextManagers
      and "finally" statements.
  
      For more details about the arguments see "signal" documentation.
  
      Args:
          signum(int): The signal's number
          frame(frame): The current stack frame, can be None
      """
  
      LOGGER.debug('signal {} was caught'.format(signum))
      sys.exit(128 + signum)